I shoot 200 grain 460's, not from a Smith revolver, but my 20" T/C barrel.
I love the round and too compare a .44 to it...well why not compare a jet to a cesna!
I feel sorry for this guy. He spent big money on that S&W. 300 rds. or not, 200 grain or not, it is broken. What a slap in the face.
However, this is the first S&W .460 that I have seen with physical damage. It does not mean that every S&W .460 is junk, let alone other models. Keep in mind how many New S&W's roll out the door everyday compared to those models that get sent back for repair.

I had a starter fail with only 5k miles on it. My Brother bought a brand new Sharp TV. Motherboard is junk.

It happens!